package com.atguigu.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.metadata.CellData;
import com.alibaba.excel.util.ConverterUtils;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.entity.excel.SubjectData;
import com.atguigu.eduservice.service.EduSubjectService;
import com.atguigu.servicebase.config.exceptionhandler.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

import java.util.Map;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {
    //因为该类不能交给spring容器进行管理，需要自己new 不能注入其他对象
    //不能实现数据库的操作

    private EduSubjectService subjectService;
    public SubjectExcelListener() {
    }
    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }
    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if (subjectData==null){
            throw  new GuliException(20001,"文件数据为空");
        }
        //一行一行读 第一个一级分类 第二个 二级分类
        EduSubject existOneSubject =this.existOneSubject(subjectService,subjectData.getOneSubjectName());
        if (existOneSubject==null){
            existOneSubject = new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneSubject);
        }
        String pid = existOneSubject.getId();
        //判断二级分类
        EduSubject existTwoSubject = this.existTwoSubject(subjectService,subjectData.getTwoSubjectName(),pid);
        if (existTwoSubject==null){
            existTwoSubject = new EduSubject();
            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());
            subjectService.save(existTwoSubject);
        }

    }

    //判断一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService,String name){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id","0");
        EduSubject oneSubject = subjectService.getOne(wrapper);
        return oneSubject;
    }
    //判断二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService,String name,String pid){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);
        EduSubject TwoSubject = subjectService.getOne(wrapper);
        return TwoSubject;
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
